The present disclosure is directed to a for manufacturing a switching apparatus for electric systems. The method includes (i) providing a first housing shell of the switching apparatus; (ii) providing a second housing shell of the switching apparatus; (iii) assembling the first and second housing shells and a number of operating components of the switching apparatus, thereby obtaining a preliminary assembly of the switching apparatus; and (iv) joining first and second coupling edges of the first and second housing shells through a vibration welding process, thereby forming a junction between the first and second housing shells and obtaining a sealed outer casing for the switching apparatus.